REFERENCES
ADAMS, K. J. (1974). The County: Factors affecting plant distribution, pp. 23-42, and map, The
Surface Geology. In: Flora of Essex by S. T. Jermyn. Essex Naturalists Trust Limited.
AVERY, B. W. (1973). Soil classification in the Soil Survey of England and Wales. J. Soil Sci.
24:324-338
AVERY, B. W., FINDLAY, D. C. and MACKNEY, D. (1974). Soil map of England and Wales,
scale 1: 1 000 000. Ordnance Survey, Southampton.
BROMEHEAD, C. E. N., POCOCK, R. W., and DINES, H. G. (1925). Drift Geology map. O.S.
3rd Ed. Sheet 256 (North London). Ordnance Survey. Revised Ed. 1951.
DINES, H. G. and EDMUNDS, F. H. (1925). Drift Geology map. O.S. 3rd. Ed. Sheet 257
(Romford). Ordnance Survey. Revised Ed. 1969.
DINES, H. G. and EDMUNDS, F. H. (1925). Geology of the country around Romford. Mem. geol.
Surv. U.K.
GIRLING, M. and GRIEG, J. (1977). Paleoecological investigations of a site near Hampstead
Heath, London, Nature 268: 45-47.
HEY, R. W., KRINSLEY, D. H. and HYDE, P. J. W. (1971). Surface textures of sand-grains from
the Hertfordshire Pebble Gravels. Geol. mag. 108(5), 377-382.
MACKNEY, D. (1961). A podzol development sequence in oakwoods and heath in central
England. J. Soil Sci 12:23-40.
QVIST, A. (1971). Epping Forest. Corporation of London.
SMITH, L. P. (1976). The agricultural climate of England and Wales. M.A.F.F. Tech. Bull. No.
35. H.M.S.O.
STURDY, R. G. (1971). Soils in Essex I: Sheet TQ 59 (Harold Hill). Soil Surv. Rec. No. 7.
THOMASSON, A. J. (1961). Some aspects of the drift deposits and geomorphology of south-east
Hertfordshire. Proc. Geol. Ass. 72, 287-302.
15